Analysts' Actions -- AOL, Encana, Humana, Microsoft and More

Here are today's top research calls.

AOL (AOL) was downgraded at Cantor Fitzgerald to sell from buy. Twelve-month price target is $47. Analysts are downgrading AOL on the back of AOL's acquisition by Verizon (VZ) for $50 a share in an all-cash transaction.

Denbury Resources (DNR) was downgraded to sell at TheStreet Ratings. You can view the full analysis from the report here: DNR Ratings Report.

Encana (ECA) was downgraded at RBC Capital to sector perform from outperform. Valuation call, based on a $15 price target.

Magellan Health (MGLN) was upgraded at Jefferies to buy from hold. Twelve-month price target is $78. Since initiating two years ago, Jefferies has been patiently waiting for improved revenue visibility on MGLN's two growth initiatives and a better risk/reward profile, Jefferies said. The 14% pullback gives investors an attractive entry. Jefferies estimates Magellan Health shares are worth about $100 (60% upside) in two to three years if management executes.

Microsoft (MSFT) was upgraded at Deutsche Bank to buy from hold. Valuation call, based on a 12-month price target of $55, Deutsche Bank said.